Wedding in Japan 3

Norbert is back and wants to take revenge. Willamina goes to the kindergarten and her siblings to the creche. William realizes, that Sissi works on the creche and she tells him, that she had a baby, that was from him and Yuki is feeling terrible since a few days. How will be the time at the creche? Is Sissis son really from William? Why is Yuki feeling so terrible? R: T in case